Myeloid Cells (D3) 2016 is organized by Keystone Symposia on Molecular and Cellular Biology and would be held during Apr 10 - 14, 2016 at NEC-Ireland's National Events and Conference Centre - Killarney, Munster, Ireland. Myeloid cells are essential in immunity: they control the interaction of the host with the environment and are indispensable in fighting infections and in the communication with other branches of the immune system. This Keystone Symposia meeting will cover topical questions in myeloid cell biology, including new concepts like the origin of myelocytes, trained immunity, and epigenetic and genetic regulation of their function. It will cover myeloid cells of both bone marrow and fetal origin with an emphasis on how macrophages interact with other myeloid cells including granulocytes.